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https://github.com/docker-mailserver/docker-mailserver
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102 lines
3.8 KiB
Bash
102 lines
3.8 KiB
Bash
#!/bin/bash
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# Set up OpenDKIM
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#
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# ## Attention
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#
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# The OpenDKIM milter must come before the OpenDMARC milter in Postfix's
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# `smtpd_milters` milters options.
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function _setup_opendkim() {
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if [[ ${ENABLE_OPENDKIM} -eq 1 ]]; then
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_log 'debug' 'Configuring DKIM'
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mkdir -p /etc/opendkim/keys/
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touch /etc/opendkim/{SigningTable,TrustedHosts,KeyTable}
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_log 'trace' "Adding OpenDKIM to Postfix's milters"
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postconf 'dkim_milter = inet:localhost:8891'
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# shellcheck disable=SC2016
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sed -i -E \
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-e 's|^(smtpd_milters =.*)|\1 \$dkim_milter|g' \
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-e 's|^(non_smtpd_milters =.*)|\1 \$dkim_milter|g' \
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/etc/postfix/main.cf
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# check if any keys are available
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if [[ -e /tmp/docker-mailserver/opendkim/KeyTable ]]; then
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cp -a /tmp/docker-mailserver/opendkim/* /etc/opendkim/
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_log 'trace' "DKIM keys added for: $(find /etc/opendkim/keys/ -maxdepth 1 -type f -printf '%f ')"
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chown -R opendkim:opendkim /etc/opendkim/
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chmod -R 0700 /etc/opendkim/keys/
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else
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_log 'debug' 'OpenDKIM enabled but no DKIM key(s) provided'
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fi
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# setup nameservers parameter from /etc/resolv.conf if not defined
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if ! grep -q '^Nameservers' /etc/opendkim.conf; then
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local NAMESERVER_IPS
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NAMESERVER_IPS=$(grep '^nameserver' /etc/resolv.conf | awk -F " " '{print $2}' | paste -sd ',' -)
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echo "Nameservers ${NAMESERVER_IPS}" >>/etc/opendkim.conf
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_log 'trace' "Nameservers added to '/etc/opendkim.conf'"
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fi
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else
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# Even though we do nothing here and the message suggests we perform some action, the
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# message is due to the default value being `1`, i.e. enabled. If the default were `0`,
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# we could have said `OpenDKIM is disabled`, but we need to make it uniform with all
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# other functions.
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_log 'debug' 'Disabling OpenDKIM'
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fi
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}
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# Set up OpenDMARC
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#
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# ## Attention
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#
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# The OpenDMARC milter must come after the OpenDKIM milter in Postfix's
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# `smtpd_milters` milters options.
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function _setup_opendmarc() {
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if [[ ${ENABLE_OPENDMARC} -eq 1 ]]; then
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# TODO When disabling SPF is possible, add a check whether DKIM and SPF is disabled
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# for DMARC to work, you should have at least one enabled
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# (see RFC 7489 https://www.rfc-editor.org/rfc/rfc7489#page-24)
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_log 'debug' 'Configuring OpenDMARC'
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_log 'trace' "Adding OpenDMARC to Postfix's milters"
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postconf 'dmarc_milter = inet:localhost:8893'
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# Make sure to append the OpenDMARC milter _after_ the OpenDKIM milter!
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# shellcheck disable=SC2016
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sed -i -E 's|^(smtpd_milters =.*)|\1 \$dmarc_milter|g' /etc/postfix/main.cf
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sed -i \
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-e "s|^AuthservID.*$|AuthservID ${HOSTNAME}|g" \
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-e "s|^TrustedAuthservIDs.*$|TrustedAuthservIDs ${HOSTNAME}|g" \
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/etc/opendmarc.conf
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else
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# Even though we do nothing here and the message suggests we perform some action, the
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# message is due to the default value being `1`, i.e. enabled. If the default were `0`,
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# we could have said `OpenDKIM is disabled`, but we need to make it uniform with all
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# other functions.
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_log 'debug' 'Disabling OpenDMARC'
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fi
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}
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# Configures the SPF check inside Postfix's configuration via policyd-spf. When
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# using Rspamd, you will likely want to turn that off.
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function _setup_policyd_spf() {
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if [[ ${ENABLE_POLICYD_SPF} -eq 1 ]]; then
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_log 'debug' 'Configuring policyd-spf'
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cat >>/etc/postfix/master.cf <<EOF
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policyd-spf unix - n n - 0 spawn
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user=policyd-spf argv=/usr/bin/policyd-spf
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EOF
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# SPF policy settings
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postconf 'policyd-spf_time_limit = 3600'
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sedfile -i -E \
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's|^(smtpd_recipient_restrictions.*reject_unauth_destination)(.*)|\1, check_policy_service unix:private/policyd-spf\2|' \
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/etc/postfix/main.cf
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else
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_log 'debug' 'Disabling policyd-spf'
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fi
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}
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